The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2005
Filed:
May. 29, 2003
Hideto Momose, Hitachiohta, JP;
Yuuichi Sawai, Hitachi, JP;
Mitsutoshi Honda, Hitachi, JP;
Takashi Naitou, Mito, JP;
Hiroyuki Akata, Hitachi, JP;
Tsukasa Ookawa, Tokyo, JP;
Hideto Momose, Hitachiohta, JP;
Yuuichi Sawai, Hitachi, JP;
Mitsutoshi Honda, Hitachi, JP;
Takashi Naitou, Mito, JP;
Hiroyuki Akata, Hitachi, JP;
Tsukasa Ookawa, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical switch, in which focal position of beams is adjusted to provide a high switching efficiency and a high stability in action without increasing a light source output of a control light, comprising a condensing means for making a signal light and a control light convergent and incident upon a nonlinear optical thin-film and wherein irradiation of the control light causes a change of the nonlinear optical thin-film in refractive index to thereby change the signal light into a transmitted light or a reflected light to take out the same as an output signal.